The chairman of Yahoo's board of directors has stepped down from that position and will leave the board entirely later this year, Yahoo said Thursday.

Fred Amoroso won't be seeking reelection when shareholders vote for board members at the company's June 25 annual meeting of shareholders, the company said. He has returned to a position as director, and Maynard Webb will become Yahoo's interim chairman.

Amoroso joined the board in February 2012 as Yahoo was embarking on the search for a new CEO. It found one six months later when Marissa Mayer jumped from the executive ranks of Google to head Yahoo.